Furuno NavNet TZtouch3 Series Operator's Manual page 138

4. POINTS, BOUNDARIES
3. To find information about a boundary or edit a boundary, tap the boundary entry
in the list.
4. Tap respective item (Latitude, Longitude circle only), Radius (circle only), Name,
Comment, Color, Contour, Transparency to change its data.
5. Tap the close button on the title bar to finish.
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Edit screen for Area, Line boundary
Edit screen for Circle boundary